package com.qianda.qdminiapp.common.future;

/**
 * @ClassName FutureCallback
 * @Author cw
 * @Date 2019/8/1 16:49
 * @Version 1.0
 */
public interface FutureCallback<R> {
    void completed(R result);

    void failed(Exception ex);

    void cancelled();


}
